code: def __exit__(self, exc_type, exc_value, traceback):
      seq = "inputimages"
      save_dir = (
          os.path.join(self.output_dir, "mot_outputs", seq)
          if self.visualization
          else None
      )
      if self.visualization:
          #### Save using ffmpeg
          # output_video_path = os.path.join(save_dir, '..', '{}_vis.mp4'.format(seq))
          # cmd_str = 'ffmpeg -f image2 -i {}/%05d.jpg -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" {}'.format(
          #    save_dir, output_video_path)
          # os.system(cmd_str)
          #### Save using opencv
          output_video_path = os.path.join(
              save_dir, "..", "{}_vis.avi".format(seq)
          )
          imgnames = glob.glob(os.path.join(save_dir, "*.jpg"))
          if len(imgnames) == 0:
              logger.info("No output images to save for video")
              return
          img = cv2.imread(os.path.join(save_dir, "00000.jpg"))
          video_writer = cv2.VideoWriter(
              output_video_path,
              apiPreference=0,
              fourcc=cv2.VideoWriter_fourcc("M", "J", "P", "G"),
              fps=30,
              frameSize=(img.shape[1], img.shape[0]),
          )
          for i in range(len(imgnames)):
              imgpath = os.path.join(save_dir, "{:05d}.jpg".format(i))
              img = cv2.imread(imgpath)
              video_writer.write(img)
          video_writer.release()
          logger.info("Save video in {}".format(output_video_path))
  
imports: import argparse
  import glob
  import os
  import signal
  import sys
  import cv2
  import paddle
  from ppdet.core.workspace import load_config
  from ppdet.core.workspace import merge_config
  from ppdet.engine import Tracker
  from ppdet.utils.check import check_config
  from ppdet.utils.check import check_gpu
  from ppdet.utils.check import check_version
  from ppdet.utils.logger import setup_logger
  import paddlehub
  from .tracker import StreamTracker
  from paddlehub.module.module import moduleinfo
  from paddlehub.module.module import runnable
label_desc: Use image node_id 5 for calling the FairmotTracker_1088x608 obj's underlying member method code with example usage: obj.__exit__(exc_type, exc_value, traceback) without return types